A filling on the last but one tooth on the bottom has come out. About a quarter sement of tooth is missing. The filling covered the top and side. It is not sensitive or painful. I can have this looked at on Wednesday. I am the process of changing my dentist. I can't see the new dentist for another month.

I am tempted to leave the tooth until I see the new dentist but I am concerned it is exposed. It has been fine the past weeek. Friends have suggested I use a tempory filling that you get over the counter but have no experience of this so I do not know if it will work and if so what happens if the cavity is not cleaned out properly.

There is nothing wrong with the dentist I could see on Wednesday but I do not have 100% faith like I would the new dentist. He filled the tooth which only lasted a year. The original lasted 15 years. May be something changed in the tooth stucture but I have a feeling the filling was not as good. The last filling was a tempory one that was ok as a permanent one apparently. I could not really get me head around this.

Anyway I would value the opinion of someone else who may have had a filling come and left it. Was it ok?

People have no idea how the teeth can affect their overall health. Heck, doctors have no idea.
The first time a tooth died on my mouth, I was sick to TWO MONTHS before either dentists or doctors figured it out. I'm recognizing the signs now.
It's particularly hard for people like me with metal based porcelain crowns as they can't x-ray thru them.
No more for me. The time has come where, if the tooth is severely compromised, I want it out.
I'll get a bridge or something, but I can't keep getting sick from these things.
Good luck!